I bought a swarovski av 4x12x50 scope for an expensive custom elk rifle in 300 ultra mag. The tracking on the scope was terrible right out of the box. They advertise precise 1/4 moa clicks. Sometimes 1 click is 1/4 moa, somtimes 1/2, somtimes 3/4. Many times elevation adjustment affects windage alot, not a little bit. After about 120 rounds somthing in scope broke + now I am all over target. Sent it in for warranty + they are so busy doing warranty repairs scope has been gone 2+1/2 months now. They acted like this is normal. I have heard about scope breaking internaly but have never had it happen to me. Many rifles many scopes. On another sight a guy had his swarovski break internaly behind a 7mm08. He said that swarovski told him that they did not recomend this scope on anthing bigger than a 7mm + that he needed to up-grade to a pv or a z6. They haven't told me that yet. I do not have any confidence in this scope. Should I assume that I just got a defective unit, put it back on the rifle + not worry about it? Should I up-grade to a z6 or pv? Considering buying a Schmidt + Bender 3x12x50 + forgetting swarovski altogether. I need absolute reliability above anything else. Weight of scope comes in second. Quality of glass comes in third. The av is 14 ounces, the pv + the z6 is 18 ounces, the schmidt + bender is 22 ounces. Gun is heavy now. What would you do?